add automatic library detection

Arduino.mk

@@ -736,7 +736,7 @@ ifeq ($(strip $(CHK_SOURCES)),)
                 $(call show_config_info,No .pde or .ino files found. If you are compiling .c or .cpp files then you need to explicitly include Arduino header files)
             else
                 #TODO: Support more than one file. https://github.com/sudar/Arduino-Makefile/issues/49
-                $(error Need exactly one .pde or .ino file. This makefile doesn't support multiple .ino/.pde files yet)
+                $(error Need exactly one .pde or .ino file. This makefile doesn\'t support multiple .ino/.pde files yet)
             endif
         endif
 
@@ -763,6 +763,19 @@ else
     $(call show_config_info,NO_CORE set so core library will not be built,[MANUAL])
 endif
 
+########################################################################
+# Automatically find the libraries needed to compile the sketch
+
+ifndef SKETCH_LIBS
+	SKETCH_LIBS := $(shell $(ARDMK_DIR)/bin/lib-detection $(USER_LIB_PATH) | \
+                sed -ne 's/SKETCH_LIBS \(.*\) /\1/p')
+endif
+
+ifndef SKETCH_LIBS_DEPS
+	SKETCH_LIBS_DEPS := $(shell $(ARDMK_DIR)/bin/lib-detection $(USER_LIB_PATH) | \
+                sed -ne 's/SKETCH_LIBS_DEPS \(.*\) /\1/p')
+endif
+
 ########################################################################
 # Determine ARDUINO_LIBS automatically
 
@@ -772,8 +785,6 @@ ifndef ARDUINO_LIBS
         $(shell sed -ne "s/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p" $(LOCAL_SRCS)))
     ARDUINO_LIBS += $(filter $(notdir $(wildcard $(ARDUINO_SKETCHBOOK)/libraries/*)), \
         $(shell sed -ne "s/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p" $(LOCAL_SRCS)))
-    ARDUINO_LIBS += $(filter $(notdir $(wildcard $(USER_LIB_PATH)/*)), \
-        $(shell sed -ne "s/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p" $(LOCAL_SRCS)))
 endif
 
 ########################################################################
@@ -872,7 +883,10 @@ get_library_files  = $(if $(and $(wildcard $(1)/src), $(wildcard $(1)/library.pr
                         $(wildcard $(1)/*.$(2) $(1)/utility/*.$(2)))
 
 # General arguments
-USER_LIBS      := $(wildcard $(patsubst %,$(USER_LIB_PATH)/%,$(ARDUINO_LIBS)))
+USER_LIBS     := $(wildcard $(patsubst %,$(USER_LIB_PATH)/%,$(ARDUINO_LIBS))) \
+                 $(wildcard $(patsubst %,$(USER_LIB_PATH)/%,$(SKETCH_LIBS))) \
+                 $(wildcard $(patsubst %,$(USER_LIB_PATH)/%,$(SKETCH_LIBS_DEPS)))
+
 USER_LIB_NAMES := $(patsubst $(USER_LIB_PATH)/%,%,$(USER_LIBS))
 
 # Let user libraries override system ones.
@@ -1032,17 +1046,32 @@ else
     $(call show_config_info,Size utility: Basic (not AVR-aware),[AUTODETECTED])
 endif
 
-ifneq (,$(strip $(ARDUINO_LIBS)))
+ifneq (,$(strip $(SKETCH_LIBS)))
     $(call arduino_output,-)
-    $(call show_config_info,ARDUINO_LIBS =)
+    $(call show_config_info,SKETCH_LIBS =)
 endif
 
-ifneq (,$(strip $(USER_LIB_NAMES)))
+ifneq (,$(strip $(SKETCH_LIBS)))
-    $(foreach lib,$(USER_LIB_NAMES),$(call show_config_info,  $(lib),[USER]))
+    $(foreach lib,$(SKETCH_LIBS),$(call show_config_info,  $(lib),[USER]))
+endif
+
+ifneq (,$(strip $(SKETCH_LIBS_DEPS)))
+    $(call arduino_output,-)
+    $(call show_config_info,SKETCH_LIBS_DEPS =)
+endif
+
+ifneq (,$(strip $(SKETCH_LIBS_DEPS)))
+    $(foreach lib,$(SKETCH_LIBS_DEPS),$(call show_config_info,  $(lib),[USER]))
+endif
+
+ifneq (,$(strip $(SYS_LIB_NAMES) $(PLATFORM_LIB_NAMES)))
+    $(call arduino_output,-)
+    $(call show_config_info,SYSTEM_LIBS =)
 endif
 
 ifneq (,$(strip $(SYS_LIB_NAMES) $(PLATFORM_LIB_NAMES)))
     $(foreach lib,$(SYS_LIB_NAMES),$(call show_config_info,  $(lib),[SYSTEM]))
+    $(call arduino_output,-)
 endif
 
 # either calculate parent dir from arduino dir, or user-defined path

HISTORY.md

@@ -34,6 +34,7 @@ I tried to give credit whenever possible. If I have missed anyone, kindly add it
 - Fix: Changed IDE download URL *again* for Travis-CI. (https://github.com/sej7278)
 - Fix: Allow avrdude to erase the chip before programming during ispload (https://github.com/tchebb)
 - Fix: Fix speed regression. Thanks ladislas (Issue #280) (https://github.com/sej7278)
+- New: Add automatic library detection when compiling a sketch. (http://github.com/ladislas)
 
 ### 1.3.4 (2014-07-12)
 - Tweak: Allow spaces in "Serial.begin (....)". (Issue #190) (https://github.com/pdav)

bin/lib-detection

@@ -0,0 +1,90 @@
+#!/usr/bin/env python
+
+import os
+import re
+import sys
+
+
+# Set variables
+USER_LIB_PATH = sys.argv[1]
+USER_LIBS = []
+
+includeRegex = re.compile("(?<=^\#include\s\")(.*)(?=\.h\")", re.DOTALL|re.M)
+
+SKETCH_SRCS = []
+SKETCH_LIBS = []
+
+SKETCH_LIBS_DEPS = []
+SKETCH_LIBS_DEPS_STACK = []
+
+
+# Define functions
+def outputLibs(libArray):
+	for lib in libArray:
+		print(lib),
+	print("")
+
+
+# Find local sources .ino, .c or .cpp
+FILE_END = (".c", ".cpp", ".ino")
+SKETCH_SRCS = [f for f in os.listdir(os.curdir) if f.endswith(FILE_END)]
+
+# Find all USER_LIBS
+for path, dirs, files in os.walk(USER_LIB_PATH):
+	for d in dirs:
+		USER_LIBS.append(d)
+
+# Find SKETCH_LIBS included in SKETCH_SRCS
+for src in SKETCH_SRCS:
+	currentFile = open(src)
+
+	for line in currentFile:
+		match = includeRegex.search(line)
+		if match is not None:
+			group = match.group(1)
+			if group in USER_LIBS:
+				SKETCH_LIBS.append(group)
+
+SKETCH_LIBS = sorted(set(SKETCH_LIBS))
+
+# Find SKETCH_LIBS_DEPS includes in SKETCH_LIBS
+for lib in SKETCH_LIBS:
+	if lib in USER_LIBS:
+		currentFile = open(os.path.join(USER_LIB_PATH, lib, lib + ".h"))
+
+		for line in currentFile:
+			match = includeRegex.search(line)
+			if match is not None:
+				group = match.group(1)
+				if group in USER_LIBS and group not in SKETCH_LIBS:
+					SKETCH_LIBS_DEPS_STACK.append(group)
+
+SKETCH_LIBS_DEPS_STACK = list(set(SKETCH_LIBS_DEPS_STACK))
+
+# Recursively find all dependencies of every libraries in USER_LIB_PATH
+while len(SKETCH_LIBS_DEPS_STACK) > 0:
+	for lib in SKETCH_LIBS_DEPS_STACK:
+		if lib in USER_LIBS:
+			currentFile = open(os.path.join(USER_LIB_PATH, lib, lib + ".h"))
+
+			for line in currentFile:
+				match = includeRegex.search(line)
+				if match is not None:
+					group = match.group(1)
+					if group in USER_LIBS and group not in SKETCH_LIBS_DEPS_STACK and group not in SKETCH_LIBS_DEPS and group not in SKETCH_LIBS:
+						SKETCH_LIBS_DEPS_STACK.append(group)
+
+				else:
+					if lib not in SKETCH_LIBS_DEPS:
+						SKETCH_LIBS_DEPS.append(lib)
+						if lib in SKETCH_LIBS_DEPS_STACK:
+							SKETCH_LIBS_DEPS_STACK.remove(lib)
+
+SKETCH_LIBS_DEPS.sort()
+
+# Output libraries for the Makefile
+print("SKETCH_LIBS"),
+outputLibs(SKETCH_LIBS)
+
+print("SKETCH_LIBS_DEPS"),
+outputLibs(SKETCH_LIBS_DEPS)